error in DAL in creating a 3-tier architecture project in asp.net using c#

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ASP.NET

ADO.NET

i m creating a small project in asp.net using c# on 3-tier architecture. i want to send seven parameters from web form to database. stored proc name is spuserdetails and parameter name are name,age,add,phno,country,state,city. my DAL code is as follows:

namespace Datalgc
{       
    public class Class1
    {
        string connStr = ConfigurationManager.ConnectionStrings["spuserdetails"].ToString();
        public int Insert(string Name, DateTime DOB, string  Addr,int phno,string Country,string State,String City)
        {
            SqlConnection conn = new SqlConnection(spuserdetails);
            conn.Open();
            SqlCommand Cmd = new SqlCommand("InsertData", conn);
            Cmd.CommandType = CommandType.StoredProcedure;
            try
            {
                Cmd.Parameters.AddWithValue("@Name", Name);
                Cmd.Parameters.AddWithValue("@DOB", DOB);
                Cmd.Parameters.AddWithValue("@Addr", Addr);
                Cmd.Parameters.AddWithValue("@phno", phno);
                Cmd.Parameters.AddWithValue("@Country", Country);
                Cmd.Parameters.AddWithValue("@State", State);
                Cmd.Parameters.AddWithValue("@City", City);
                return Cmd.ExecuteNonQuery();
            }
            catch
            {
                throw;
            }
            finally
            {
                Cmd.Dispose();
                conn.Close();
                conn.Dispose();
            }
        }
    }
}

the statement

Cmd.CommandType = CommandType.StoredProcedure;

shows that the commandtype does not exist in current context.why?